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Olympus E-M1X vs Sony A7R II

The Olympus OM-D E-M1X and the Sony Alpha A7R II are two enthusiast cameras that were officially introduced, respectively, in January 2019 and June 2015. Both the E-M1X and the A7R II are mirrorless interchangeable lens cameras that are based on a Four Thirds (E-M1X) and a full frame (A7R II) sensor. The Olympus has a resolution of 20.2 megapixels, whereas the Sony provides 42.2 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Olympus E-M1X   Sony A7R II
Olympus E-M1X Sony A7R II
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Sony E mount lenses
20.2 MP, Four Thirds Sensor 42.2 MP, Full Frame Sensor
4K/30p Video 4K/30p Video
ISO 200-25600 ISO 100-25600 (50-102400)
Electronic viewfinder (2360k dots) Electronic viewfinder (2400k dots)
3.0" LCD, 1037k dots 3.0" LCD, 1229k dots
Swivel touchscreen Tilting screen (not touch-sensitive)
18 shutter flaps per second 5 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
870 shots per battery charge290 shots per battery charge
144 x 147 x 75 mm, 997 g 127 x 96 x 60 mm, 625 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M1X and the Sony Alpha A7R II? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

An illustration of the physical size and weight of the Olympus E-M1X and the Sony A7R II is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

The E-M1X can be obtained in two different colors (black, silver), while the A7R II is only available in black.

Size Olympus E-M1X vs Sony A7R II
Compare E-M1X versus A7R II top
Comparison E-M1X or A7R II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R II is considerably smaller (42 percent) than the Olympus E-M1X. Moreover, the A7R II is substantially lighter (37 percent) than the E-M1X. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Micro Four Thirds Lens Catalog (E-M1X) and the Sony FE Lens Catalog (A7R II). Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.

Concerning battery life, the E-M1X gets 870 shots out of its BLH-1 battery, while the A7R II can take 290 images on a single charge of its NP-FW50 power pack. As can be seen in the images above, the E-M1X has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. In order to provide similar functionality for the A7R II, Sony provides the VG-C2EM vertical grip as an optional accessory (see here on eBay). The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Olympus E-M1X» 144 mm 147 mm 75 mm 997 g 870 Y Jan 2019 2,999 i i Olympus E-M1X
 
Sony A7R II« 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199- i Sony A7R II
 
Olympus E-PL9« » 117 mm 68 mm 39 mm 380 g 350 n Feb 2018 549 i i Olympus E-PL9
 
Olympus E-M1 II« » 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 1,999 i i Olympus E-M1 II
 
Panasonic S1« » 149 mm 110 mm 97 mm 1017 g 400 Y Feb 2019 2,499 i i Panasonic S1
 
Panasonic S1R« » 149 mm 110 mm 97 mm 1016 g 380 Y Feb 2019 3,699 i i Panasonic S1R
 
Panasonic G90« » 130 mm 94 mm 77 mm 536 g 290 Y Apr 2019 999 i i Panasonic G90
 
Panasonic S1H« » 151 mm 114 mm 110 mm 1052 g 400 Y May 2019 3,999 i i Panasonic S1H
 
Panasonic GH5s« » 139 mm 98 mm 87 mm 660 g 440 Y Jan 2018 2,499 i i Panasonic GH5s
 
Panasonic G9« » 137 mm 97 mm 92 mm 658 g 400 Y Nov 2017 1,699 i i Panasonic G9
 
Panasonic GH5« » 139 mm 98 mm 87 mm 725 g 410 Y Jan 2017 1,999 i i Panasonic GH5
 
Sony A7R III« » 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199- i Sony A7R III
 
Sony A99 II« » 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199 i i Sony A99 II
 
Sony A7S II« » 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999 i i Sony A7S II
 
Sony A7 II« » 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999- i Sony A7 II
 
Sony A7R« » 127 mm 94 mm 48 mm 465 g 340 Y Oct 2013 2,299- i Sony A7R
 
Sony A900« » 156 mm 117 mm 82 mm 895 g 880 Y Sep 2008 2,999- i Sony A900
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The E-M1X was somewhat cheaper (by 6 percent) than the A7R II at launch, but both cameras fall into the same price category. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Olympus E-M1X features a Four Thirds sensor and the Sony A7R II a full frame sensor. The sensor area in the A7R II is 283 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the E-M1X has a native 4:3 aspect ratio, while the one in the A7R II offers a 3:2 aspect.

Olympus E-M1X and Sony A7R II sensor measures

With 42.2MP, the A7R II offers a higher resolution than the E-M1X (20.2MP), but the A7R II nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.34μm for the E-M1X) due to its larger sensor. However, the E-M1X is a much more recent model (by 3 years and 7 months) than the A7R II, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.

The resolution advantage of the Sony A7R II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R II for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inch or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inch or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inch or 67.3 x 44.9 cm. The corresponding values for the Olympus E-M1X are 25.9 x 19.4 inch or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inch or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inch or 43.9 x 32.9 cm for excellent quality prints.

Unlike the A7R II, the E-M1X has the capacity to capture high quality composite images (80MP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Olympus OM-D E-M1X has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 64-25600. The corresponding ISO settings for the Sony Alpha A7R II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-102400.

E-M1X versus A7R II MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Olympus E-M1X» Four Thirds 20.2 5184 38884K/30p----Olympus E-M1X
 
Sony A7R II« Full Frame 42.2 7952 53044K/30p26.013.9343498Sony A7R II
 
Olympus E-PL9« » Four Thirds 15.9 4608 34564K/30p----Olympus E-PL9
 
Olympus E-M1 II« » Four Thirds 20.2 5184 38884K/30p23.712.8131280Olympus E-M1 II
 
Panasonic S1« » Full Frame 24.0 6000 40004K/60p25.214.5333395Panasonic S1
 
Panasonic S1R« » Full Frame 46.7 8368 55844K/60p26.414.13525100Panasonic S1R
 
Panasonic G90« » Four Thirds 20.2 5184 38884K/30p----Panasonic G90
 
Panasonic S1H« » Full Frame 24.0 6000 40006K/30p----Panasonic S1H
 
Panasonic GH5s« » Four Thirds 9.9 3680 27004K/60p----Panasonic GH5s
 
Panasonic G9« » Four Thirds 20.2 5184 38884K/60p----Panasonic G9
 
Panasonic GH5« » Four Thirds 20.2 5184 38884K/60p23.913.080777Panasonic GH5
 
Sony A7R III« » Full Frame 42.2 7952 53044K/30p26.014.73523100Sony A7R III
 
Sony A99 II« » Full Frame 42.2 7952 53044K/30p25.413.4231792Sony A99 II
 
Sony A7S II« » Full Frame 12.0 4240 28324K/30p23.613.3299385Sony A7S II
 
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II
 
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695Sony A7R
 
Sony A900« » Full Frame 24.4 6048 4032-23.712.3143179Sony A900

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (4K/30p).

 

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A7R II offers a slightly higher resolution than the one in the E-M1X (2400k vs 2360k dots). The adjacent table lists some of the other core features of the Olympus E-M1X and Sony A7R II along with similar information for a selection of comparators.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Olympus E-M1X»2360 n 3.0 1037 swivel Y 1/8000s 18.0 n Y Olympus E-M1X
 
Sony A7R II«2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y Sony A7R II
 
Olympus E-PL9« »- n 3.0 1040 tilting Y 1/4000s 8.6 Y Y Olympus E-PL9
 
Olympus E-M1 II« »2360 n 3.0 1037 swivel Y 1/8000s 18.0 n Y Olympus E-M1 II
 
Panasonic S1« »5760 Y 3.2 2100 full-flex Y 1/8000s 9.0 n Y Panasonic S1
 
Panasonic S1R« »5760 Y 3.2 2100 full-flex Y 1/8000s 9.0 n Y Panasonic S1R
 
Panasonic G90« »2360 n 3.0 1240 swivel Y 1/4000s 9.0 Y Y Panasonic G90
 
Panasonic S1H« »5760 Y 3.2 2330 swivel Y 1/8000s 9.0 n Y Panasonic S1H
 
Panasonic GH5s« »3680 n 3.2 1620 swivel Y 1/8000s 12.0 n n Panasonic GH5s
 
Panasonic G9« »3680 Y 3.0 1040 swivel Y 1/8000s 20.0 n Y Panasonic G9
 
Panasonic GH5« »3680 n 3.2 1620 swivel Y 1/8000s 12.0 n Y Panasonic GH5
 
Sony A7R III« »3686 n 3.0 1440 tilting Y 1/8000s 10.0 n Y Sony A7R III
 
Sony A99 II« »2400 Y 3.0 1229 full-flex n 1/8000s 12.0 n Y Sony A99 II
 
Sony A7S II« »2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y Sony A7S II
 
Sony A7 II« »2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y Sony A7 II
 
Sony A7R« »2400 n 3.0 1230 tilting n 1/8000s 4.0 n n Sony A7R
 
Sony A900« »optical Y 3.0 922 fixed n 1/8000s 5.0 n Y Sony A900

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The E-M1X has a touchscreen, while the A7R II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The E-M1X has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A7R II does not have a selfie-screen.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, both cameras under consideration feature an electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Olympus E-M1X has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The E-M1X writes its imaging data to SDXC cards, while the A7R II uses SDXC or Memory Stick PRO Duo cards. The E-M1X features dual card slots, which can be very useful in case a memory card fails. In contrast, the A7R II only has one slot. The E-M1X supports UHS-II cards (on both slots), while the A7R II can use UHS-I cards.

 

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Olympus OM-D E-M1X and Sony Alpha A7R II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Olympus E-M1X»YstereomonoYYmicro3.0Y-YOlympus E-M1X
 
Sony A7R II«YstereomonoYYmicro2.0YY-Sony A7R II
 
Olympus E-PL9« »Ystereomono--micro2.0Y-YOlympus E-PL9
 
Olympus E-M1 II« »YstereomonoYYmicro3.0Y--Olympus E-M1 II
 
Panasonic S1« »YstereomonoYYfull3.1Y-YPanasonic S1
 
Panasonic S1R« »YstereomonoYYfull3.1Y-YPanasonic S1R
 
Panasonic G90« »YstereomonoYYmicro2.0Y-YPanasonic G90
 
Panasonic S1H« »YstereomonoYYfull3.1Y-YPanasonic S1H
 
Panasonic GH5s« »YstereomonoYYfull3.1Y-YPanasonic GH5s
 
Panasonic G9« »YstereomonoYYfull3.0Y-YPanasonic G9
 
Panasonic GH5« »YstereomonoYYfull3.1Y-YPanasonic GH5
 
Sony A7R III« »YstereomonoYYmicro3.1YYYSony A7R III
 
Sony A99 II« »YstereomonoYYmicro2.0YYYSony A99 II
 
Sony A7S II« »YstereomonoYYmicro2.0YY-Sony A7S II
 
Sony A7 II« »YstereomonoYYmicro2.0YY-Sony A7 II
 
Sony A7R« »YstereomonoYYmicro2.0YY-Sony A7R
 
Sony A900« »Y----mini2.0---Sony A900

Studio photographers will appreciate that the Olympus E-M1X (unlike the A7R II) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Travel and landscape photographers will find it useful that the E-M1X has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The E-M1X is a recent model that features in the current product line-up of Olympus. In contrast, the A7R II has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the A7R II was succeeded by the Sony Alpha A7R III. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Olympus and Sony websites.


Review summary

So what is the bottom line? Is the Olympus E-M1X better than the Sony A7R II or vice versa? Below is a summary of the relative strengths of each of the two contestants.

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Arguments in favor of the Olympus OM-D E-M1X:

  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.83x vs 0.78x).
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (18 vs 5 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (870 versus 290) on a single battery charge.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Reflects 3 years and 7 months of technical progress since the A7R II launch.

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Advantages of the Sony Alpha A7R II:

  • More detail: Has more megapixels (42.2 vs 20.2MP), which boosts linear resolution by 48%.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1037k dots).
  • More compact: Is smaller (127x96mm vs 144x147mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 372g or 37 percent) and is thus easier to take along.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More heavily discounted: Has been around for much longer (launched in June 2015).

If the number of relative strengths (bullet points above) is taken as a guide, the E-M1X is the clear winner of the match-up (16 : 6 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

E-M1X 16:06 A7R II

How about other alternatives? Do the specifications of the Olympus E-M1X and the Sony A7R II place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the E-M1X or the A7R II. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Olympus E-M1X»o-4.5/55/5- Jan 2019 2,999 i i Olympus E-M1X
 
Sony A7R II«+ +90/1005/54.5/55/5 Jun 2015 3,199- i Sony A7R II
 
Olympus E-PL9« »+-4.5/5-4/5 Feb 2018 549 i i Olympus E-PL9
 
Olympus E-M1 II« »+ +85/1004.5/55/54.5/5 Sep 2016 1,999 i i Olympus E-M1 II
 
Panasonic S1« »+ +88/1004.5/5-4/5 Feb 2019 2,499 i i Panasonic S1
 
Panasonic S1R« »-89/1004.5/5-4.5/5 Feb 2019 3,699 i i Panasonic S1R
 
Panasonic G90« »+83/1004.5/5-4.5/5 Apr 2019 999 i i Panasonic G90
 
Panasonic S1H« »----- May 2019 3,999 i i Panasonic S1H
 
Panasonic GH5s« »-84/1004.5/55/54.5/5 Jan 2018 2,499 i i Panasonic GH5s
 
Panasonic G9« »+ +85/1005/55/55/5 Nov 2017 1,699 i i Panasonic G9
 
Panasonic GH5« »+ +85/1004.5/55/55/5 Jan 2017 1,999 i i Panasonic GH5
 
Sony A7R III« »+ +90/1004.5/55/55/5 Oct 2017 3,199- i Sony A7R III
 
Sony A99 II« »-85/1004.5/54.5/54.5/5 Sep 2016 3,199 i i Sony A99 II
 
Sony A7S II« »+-4.5/55/55/5 Sep 2015 2,999 i i Sony A7S II
 
Sony A7 II« »+82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II
 
Sony A7R« »+ +82/1004.5/55/55/5 Oct 2013 2,299- i Sony A7R
 
Sony A900« »+ ++ +4.5/54/55/5 Sep 2008 2,999- i Sony A900
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Olympus E-M1X:
Check Amazon price
Sony A7R II:
Check Ebay offers

Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Olympus E-M1X vs Sony A7R II

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Olympus E-M1X Sony A7R II
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Sony E mount lenses
    Launch Date January 2019 June 2015
    Launch Price USD 2999 USD 3199
    Sensor Specs Olympus E-M1X Sony A7R II
    Sensor Technology CMOS BSI-CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.9 x 24.0 mm
    Sensor Area 224.9 mm2 861.6 mm2
    Sensor Diagonal 21.6 mm 43.2 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 20.2 Megapixels 42.2 Megapixels
    Image Resolution 5184 x 3888 pixels 7952 x 5304 pixels
    Pixel Pitch 3.34 μm 4.52 μm
    Pixel Density 8.96 MP/cm2 4.90 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/30p Video 4K/30p Video
    ISO Setting 200-25600 ISO 100-25600 ISO
    ISO Boost 64-25600 ISO 50-102400 ISO
    Image Processor Dual TruePic VIII BIONZ X
    DXO Sensor Quality (score) .. 98
    DXO Color Depth (bits) .. 26.0
    DXO Dynamic Range (EV) .. 13.9
    DXO Low Light (ISO) .. 3434
    Screen Specs Olympus E-M1X Sony A7R II
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.83x 0.78x
    Viewfinder Resolution 2360k dots 2400k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 1037k dots 1229k dots
    LCD Attachment Swivel screen Tilting screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Olympus E-M1X Sony A7R II
    Autofocus System On-Sensor Phase-detect On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000/s 1/8000/s
    Continuous Shooting 18 shutter flaps/s 5 shutter flaps/s
    Shutter Life Expectancy200 000 actuations500 000 actuations
    Electronic Shutterup to 1/32000sYES
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option Dual card slots Single card slot
    UHS card support Dual UHS-II UHS-I
    Connectivity Specs Olympus E-M1X Sony A7R II
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 3.0 USB 2.0
    HDMI Port micro HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Bluetooth Support Bluetooth built-in no Bluetooth
    Geotagging GPS built-in no internal GPS
    Body Specs Olympus E-M1X Sony A7R II
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type BLH-1 NP-FW50
    Battery Life (CIPA)870 shots per charge290 shots per charge
    In-Camera Charging USB charging USB charging
    Body Dimensions 144 x 147 x 75 mm
    (5.7 x 5.8 x 3.0 in)
    127 x 96 x 60 mm
    (5.0 x 3.8 x 2.4 in)
    Camera Weight 997 g (35.2 oz) 625 g (22.0 oz)

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